小编Nik*_*ton的帖子

我想使自定义对象可以哈希(通过酸洗).我可以找到__hash__Python 2.x的算法(参见下面的代码),但它明显不同于 Python 3.2的哈希(我想知道为什么？).有谁知道如何__hash__在Python 3.2中实现？

#Version: Python 3.2

def c_mul(a, b):
    #C type multiplication
    return eval(hex((int(a) * b) & 0xFFFFFFFF)[:-1])

class hs:
    #Python 2.x algorithm for hash from http://effbot.org/zone/python-hash.htm
    def __hash__(self):
        if not self:
            return 0 # empty
        value = ord(self[0]) << 7
        for char in self:
            value = c_mul(1000003, value) ^ ord(char)
        value = value ^ len(self)
        if value == -1:
            value = -2
        return value


def main():
    s = ["PROBLEM", "PROBLEN", "PROBLEO", "PROBLEP"]#, …